About

Gender

Male


Location

Santiago


About Me:

Electronics Development Engineer Since 74


Please tell us a bit about your UAV interest

Building Big quads and hexes. Greater than 750mm Higher Payload. Precision autonomous flight


Hometown:

Vancouver Canada


Activity Feed

David Pawlak posted a discussion
It's been ages since I've been here so I'm not up on the latest.I know there's been discussions about multi-channel coms with these radios, I think there was a few years ago, but I can't find anything useful.I have one ground station and several…
Jan 19, 2019
David Pawlak posted a discussion
I want to send a non-RS232 type signal using the 3DR telemetry radio. No start, stop bits etc. Just bits to be reflected exactly on the other end.They do have a format but its not the standard RS232 async format we all know and love.I'm trying to…
Apr 9, 2018
David Pawlak replied to Forrest Haller's discussion What are the standard CAN protocols that drones use?
"What's the typical transmission speed for UAVCAN?"
May 31, 2016
David Pawlak commented on Chris Anderson's blog post uAvionix (ADS-B for Pixhawk) raises VC from Andy Rubin of Google/Android fame
"@John.
Ahh yeah, OK. Brings up a point though. Of course it's useful that we know where other flying objects are but I think it's probably more important that they know where we are.

We're harder to see, and while we really shouldn't be in their…"
May 3, 2016
David Pawlak commented on Chris Anderson's blog post uAvionix (ADS-B for Pixhawk) raises VC from Andy Rubin of Google/Android fame
"@Chris J. WOW 16W?
Looks like a serial interface, so at least that could allow getting it away from most of the sensitive stuff, but still, 80cm would be close at that power. And then theres power supply management... and those serial cables look…"
May 3, 2016
David Pawlak commented on Chris Anderson's blog post uAvionix (ADS-B for Pixhawk) raises VC from Andy Rubin of Google/Android fame
"ADS-B Automatic Dependant Surveilance - Broadcast
Just in case anyone was wondering
https://en.wikipedia.org/wiki/Automatic_dependent_surveillance_%E2%...
Sort of like a modern version of the old aviation transponders, but everyone can see them, and…"
May 3, 2016
David Pawlak replied to Randy's discussion Copter reliability vs functionality
"This is encouraging. It shows that it is possible.

In large scale industrial systems I've seen that it's very normal that the "designer/developer" can make his machine work "to perfection". But anyone else can quickly find the bugs, or can't easily…"
Jun 5, 2015
David Pawlak replied to Randy's discussion Copter reliability vs functionality
"I just came back from another test with my X8 and 3.2.1. I started by taming down the gains, they were at autotune values from a 3.2 autotune.

This test was with standard X8 gains plus ATC_ACCEL:RP_MAX at 72000, ATC_RATE_RP_MAX at 18000 and…"
Jun 4, 2015
David Pawlak replied to Randy's discussion Copter reliability vs functionality
"I'm sure my X-8 is worse with this, and right now it has 3.2.1 on it. My IRIS has 3.3rc5. So I'll test with the same firmware on both and try to get the parameters as close as possible.

Sorry about the Loiter braking comment. I haven't used Loiter…"
Jun 1, 2015
David Pawlak replied to Randy's discussion Copter reliability vs functionality
"Ahhh-Haaa. Great!  So it behooves us to be the first to resolve this.

My bigger X-8 behaves similarly to the video they show there. All very familiar. I did manage to improve it with some adjustments, but just got it down to 2 or 3 m drops. They…"
Jun 1, 2015
David Pawlak replied to Randy's discussion Copter reliability vs functionality
"It's really quite a complex issue (nonetheless important).
The theme was looked at fairly intently. In the end investigations basically proved that it IS an aerodynamic effect of pressure modification in a bubble around the craft. One would think…"
Jun 1, 2015
David Pawlak replied to Randy's discussion Copter reliability vs functionality
"To be honest, I just came back from a short test (6 min) comparing poshold and loiter.

Everything worked perfectly!! Go figure?? It's a pretty calm day though, it's incredible what a bit of wind can do.

I'm using 3.3rc5 right now. Since I really…"
May 31, 2015
David Pawlak replied to Randy's discussion Copter reliability vs functionality
"Hi Leonard,

I seem to remember that among the claims of poshold, was it's abibility to close the gap between Loiter, and the parallel funtionality the DJI offered. I'd really have to go back and search the files to get the details, but the main…"
May 31, 2015
David Pawlak replied to Randy's discussion Copter reliability vs functionality
"Perhaps this is something that follows cycles. For instance the move to 3.2 was a big one and involved many new features and improvments. And these are necesary, to compete, to provide long required safety features, stability etc.

But once a major…"
May 31, 2015
David Pawlak replied to Randy's discussion Copter-3.3 beta testing
"A couple more tests on the bench.

As suspected, once the unit warms up, a power reset shows less altitude deviation, it only climbs to about a meter in a couple of minutes and stabilizes. But it doesn't reset on ARM."
May 21, 2015
David Pawlak replied to Randy's discussion Copter-3.3 beta testing
" A bump on my problem of 12 hrs ago.

I see that the altitude drift after  initial  boot isn't reset on arming. Is there something new there?

Yesterday, I took off from +3m and landed at 9m. This would affect autoland. (in this case I did a manual…"
May 21, 2015
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